Try switching back to aluminum antiperspirant but looking for fragrance-free, dye-free formulas specifically labeled for sensitive skin - brands like Vanicream or CeraVe make ones that won't irritate like regular deodorants do. The thing is, aluminum-free deodorants just mask odor rather than actually stopping sweat, so if your skin is reacting to the natural oils and baking soda in those products, you might genuinely need the antiperspirant function. Give your underarms a break for a few days too before trying anything new, since they're probably still irritated from the rash. Some people also find that switching to deodorant sticks instead of sprays or roll-ons helps since there's less friction and fewer weird ingredients 🙂